Engine throttle valve control method and device, vehicle control unit and medium

Abstract

The invention discloses an engine throttle valve control method and device, a vehicle control unit and a medium. The method comprises the following steps: determining a throttle valve basic control limit range under different combustion modes of an engine; determining an engine boost pressure limit range based on the engine aftertreatment system crystallization temperature; the real-time engine intake manifold pressure is obtained; determining a dynamic limiting factor of the intake manifold pressure according to the real-time engine intake manifold pressure and the engine supercharging pressure limiting range; and according to the dynamic limiting factor and the throttle valve basic control limiting range, throttle valve control limiting ranges in different combustion modes are determined. According to the scheme, the throttle valve is used for controlling the limiting range, so that in the switching process under different combustion modes, the change of the closing degree of the throttle valve is not too violent, the pressure of the intake manifold is in smooth transition, and meanwhile, the risk of engine oil dilution is reduced under all the combustion modes.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of engine technology, and in particular to an engine throttle control method, device, vehicle controller, and medium. Background Art

[0002] According to national regulations, commercial vehicles must meet China's Stage VI emission requirements, and there will be more stringent National VII regulations in the future. The impacts brought about by this include but are not limited to stricter engine emission regulations, which puts forward more stringent requirements on the engine's exhaust emission thermal management capabilities.

[0003] The generator system includes a throttle valve, an intake manifold, an engine and an exhaust gas after-treatment system; the closing degree of the throttle valve can control the air flow rate entering the engine body through the intake manifold; the engine body produces a fuel reaction under the action of air, thereby generating power output; after the fuel reaction, the engine body will produce exhaust gas, and the exhaust gas can be processed by a catalytic reaction through the exhaust gas after-treatment system; the closing degree of the actual throttle valve controlled in the closed loop is different under different combustion modes, thereby meeting the combustion requirements and catalytic temperature requirements of different combustion modes; in the prior art, during the switching process of different combustion modes, the closing degree of the throttle valve varies greatly, which will cause a large change in the intake manifold pressure. Summary of the invention

[0004] The present invention provides an engine throttle valve control method, device, vehicle controller, and medium, so as to ensure that the closing degree of the throttle valve does not change too drastically during the switching process between different combustion modes, thereby making the intake manifold pressure transition smoothly, and at the same time reducing the risk of oil dilution in each combustion mode.

[0005] To achieve the above objectives, in a first aspect, an embodiment of the present invention provides an engine throttle valve control method, the engine throttle valve control method comprising:

[0006] Determine the basic control limit range of the throttle valve under different combustion modes of the engine;

[0007] Determining the engine boost pressure limit range based on the engine aftertreatment system crystallization temperature;

[0008] Get real-time engine intake manifold pressure;

[0009] Determining a dynamic limiting factor of the intake manifold pressure according to the real-time engine intake manifold pressure and the engine boost pressure limiting range;

[0010] The throttle valve control limit range under different combustion modes is determined according to the dynamic limit factor and the throttle valve basic control limit range.

[0011] Optionally, determining a throttle valve basic control limit range under different combustion modes of the engine includes:

[0012] Based on the first MAP table, determining a throttle valve basic control upper limit value according to speed parameters and torque parameters under different combustion modes;

[0013] Based on the second MAP table, the throttle valve basic control lower limit value is determined according to the speed parameters and the torque parameters under different combustion modes.

[0014] Optionally, determining the basic control limit range of the throttle valve under different combustion modes of the engine also includes:

[0015] Correcting the throttle valve basic control upper limit value according to the intake manifold pressure influence parameter to determine the throttle valve basic correction control upper limit value;

[0016] The throttle valve basic control lower limit value is corrected according to the intake manifold pressure influence parameter to determine the throttle valve basic corrected control lower limit value.

[0017] Optionally, the throttle valve basic control upper limit value is corrected according to the intake manifold pressure influence parameter to determine the throttle valve basic corrected control upper limit value, including:

[0018] Determine an intake manifold pressure influencing parameter factor according to the intake manifold pressure influencing parameter;

[0019] Determining an intake manifold pressure influence correction parameter according to the intake manifold pressure influence parameter factor and the intake manifold pressure influence parameter;

[0020] Determining a throttle valve basic correction control upper limit value according to the intake manifold pressure influence correction parameter and the throttle valve basic control upper limit value;

[0021] A throttle valve basic correction control lower limit value is determined according to the intake manifold pressure influence correction parameter and the throttle valve basic control lower limit value.

[0022] Optionally, the intake manifold pressure influencing parameters include: atmospheric pressure parameters, engine temperature parameters, engine intake manifold temperature deviation and engine after-treatment system temperature parameters.

[0023] Optionally, the engine boost pressure limit range is determined based on the crystallization temperature of the engine aftertreatment system, including:

[0024] Determining an engine boost pressure basic upper limit value and an engine boost pressure basic lower limit value based on a crystallization temperature of an engine aftertreatment system;

[0025] The engine boost pressure upper limit value is determined by correcting the engine boost pressure base upper limit value according to the atmospheric pressure parameter;

[0026] The engine boost pressure lower limit value is determined by correcting the engine boost pressure base lower limit value according to the atmospheric pressure parameter.

[0027] Optionally, the engine boost pressure upper limit value is determined by correcting the engine boost pressure base upper limit value according to the atmospheric pressure parameter, including:

[0028] determining an atmospheric pressure correction factor according to the atmospheric pressure parameter;

[0029] Determining an atmospheric pressure correction parameter according to the atmospheric pressure correction factor and the atmospheric pressure parameter;

[0030] Determining an upper limit value of the engine boost pressure according to an atmospheric pressure parameter and the basic upper limit value of the engine boost pressure;

[0031] The method of correcting the basic lower limit value of the engine boost pressure according to the atmospheric pressure parameter to determine the lower limit value of the engine boost pressure includes:

[0032] determining an atmospheric pressure correction factor according to the atmospheric pressure parameter;

[0033] Determining an atmospheric pressure correction parameter according to the atmospheric pressure correction factor and the atmospheric pressure parameter;

[0034] The engine boost pressure lower limit value is determined according to the atmospheric pressure parameter and the engine boost pressure basic lower limit value.

[0035] Optionally, determining a dynamic limiting factor of the intake manifold pressure according to the real-time engine intake manifold pressure and the engine boost pressure limiting range includes:

[0036] When the real-time engine intake manifold pressure is within the engine boost pressure limit range, determining a dynamic limit factor of the intake manifold pressure according to the real-time engine intake manifold pressure and the engine boost pressure limit range;

[0037] When the real-time engine intake manifold pressure is greater than the engine boost pressure upper limit value, determining the dynamic limit factor of the intake manifold pressure to be 1;

[0038] When the real-time engine intake manifold pressure is less than the engine boost pressure lower limit value, the dynamic limit factor of the intake manifold pressure is determined to be zero.

[0039] Optionally, when the real-time engine intake manifold pressure is within the engine boost pressure limit range, a dynamic limit factor of the intake manifold pressure is determined according to the real-time engine intake manifold pressure and the engine boost pressure limit range, specifically:

[0040] determining a dynamic engine boost pressure limit difference value according to the real-time engine intake manifold pressure and the engine boost pressure lower limit value;

[0041] The dynamic limiting factor is determined according to the dynamic engine boost pressure limiting difference, the engine boost pressure lower limit value and the engine boost pressure upper limit value.

[0042] Optionally, determining the throttle valve control limit range under different combustion modes according to the dynamic limit factor and the throttle valve basic control limit range includes:

[0043] Determining the throttle valve control upper limit value under different combustion modes according to the dynamic limiting factor, the throttle valve basic control upper limit value and the throttle valve basic control lower limit value;

[0044] The throttle valve basic control lower limit value and the throttle valve control upper limit value determine the throttle valve control restriction range.

[0045] Optionally, determining the throttle valve control upper limit value under different combustion modes according to the dynamic limiting factor, the throttle valve basic control upper limit value and the throttle valve basic control lower limit value includes:

[0046] Determining a throttle valve basic control limit difference according to the throttle valve basic control upper limit value and the throttle valve basic control lower limit value;

[0047] Determining a throttle valve basic control upper limit deviation according to the throttle valve basic control limit difference and the dynamic limit factor;

[0048] The throttle valve control upper limit value under different combustion modes is determined according to the throttle valve basic control upper limit deviation and the throttle valve basic control lower limit value.

[0049] Optionally, after the throttle valve basic control lower limit value is corrected according to the intake manifold pressure influence parameter to determine the throttle valve basic corrected control lower limit value, the method further includes:

[0050] According to the linear optimization table, the throttle valve basic correction control upper limit value and the throttle valve basic correction control upper limit value are linearly optimized.

[0051] In a second aspect, an embodiment of the present invention further provides an engine throttle valve control device, which is used to execute the engine throttle valve control method described in the first aspect, and the engine throttle valve control device includes:

[0052] A first determination module is used to determine a basic control limit range of a throttle valve under different combustion modes of the engine;

[0053] A second determination module, configured to determine a limit range of the engine boost pressure based on a crystallization temperature of an engine aftertreatment system;

[0054] Acquisition module, used to obtain real-time engine intake manifold pressure

[0055] a third determination module, configured to determine a dynamic limiting factor of the intake manifold pressure according to the real-time engine intake manifold pressure and the engine boost pressure limiting range;

[0056] The fourth determination module is used to determine the throttle valve control limit range under different combustion modes according to the dynamic limit factor and the throttle valve basic control limit range.

[0057] In a third aspect, an embodiment of the present invention further provides a vehicle controller, the vehicle controller comprising:

[0058] one or more processors;

[0059] a storage device for storing one or more programs,

[0060] When the one or more programs are executed by the one or more processors, the one or more processors implement the engine throttle valve control method as described in the first aspect.

[0061] In a fourth aspect, an embodiment of the present invention further provides a storage medium comprising computer executable instructions, wherein the computer executable instructions, when executed by a computer processor, are used to execute the engine throttle control method as described in any one of the first aspects.

[0062] In an embodiment of the present invention, a basic control limit range of a throttle valve under different combustion modes of an engine is determined; a limit range of an engine boost pressure is determined based on a crystallization temperature of an engine aftertreatment system; a real-time engine intake manifold pressure is obtained; a dynamic limit factor of the intake manifold pressure is determined according to the real-time engine intake manifold pressure and the engine boost pressure limit range; and a control limit range of a throttle valve under different combustion modes is determined according to the dynamic limit factor and the basic control limit range of the throttle valve. In this way, the throttle valve control limit range can be used to ensure that the closing degree of the throttle valve will not change too drastically during switching between different combustion modes, thereby allowing a smooth transition of the intake manifold pressure and reducing the risk of oil dilution under each combustion mode.

[0063] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0065] Figure 1 is a flow chart of an engine throttle valve control method provided by an embodiment of the present invention;

[0066] Figure 2 is a flow chart of another engine throttle valve control method provided by an embodiment of the present invention;

[0067] Figure 3 is a flow chart of another engine throttle valve control method provided by an embodiment of the present invention;

[0068] Figure 4 It is a structural schematic diagram of an engine throttle valve control device provided by an embodiment of the present invention;

[0069] Figure 5 is a specific structural schematic diagram of an engine throttle valve control device provided by an embodiment of the present invention;

[0070] Figure 6 It is a structural schematic diagram of a vehicle controller provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0071] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0072] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0073] Figure 1 is a flow chart of an engine throttle valve control method provided by an embodiment of the present invention; this embodiment can be applied to determine the closing degree of the engine throttle valve, and the method can be executed by the engine throttle valve control device, such as Figure 1 As shown, the method specifically comprises the following steps:

[0074] S110: Determine a basic control limit range of a throttle valve under different combustion modes of the engine.

[0075] Among them, the throttle valve basic control limit range is a range interval composed of the throttle valve basic control upper limit value and the throttle valve basic control lower limit value; the throttle valve basic control upper limit value is the upper limit throttle valve closing degree reference value in the throttle valve adjustment process; the throttle valve basic control lower limit value is usually when the throttle valve is in a state close to 0, that is, the throttle valve on the engine is usually in a state close to fully open under normal conditions.

[0076] Generally, when the throttle valve is kept fully open, air can enter the engine intake manifold through the throttle valve, thereby causing the engine combustion reaction; exhaust gas will be generated during the engine combustion reaction, and the exhaust gas will improve the compressor intake efficiency after passing through the supercharger, promoting more air to enter the engine through the throttle valve, thereby increasing the pressure of the engine intake manifold, and then causing the engine to output a certain torque to meet the user's fuel consumption needs; the more the engine intake manifold pressure increases, the greater the engine output torque; and on the basis of meeting the fuel consumption demand, the smaller the throttle valve is closed, the greater the intake manifold pressure, and the more air there is in the engine, the more fuel there is in the engine. The more complete the combustion is, the lower the exhaust gas temperature is, which affects the catalytic treatment of the engine after-treatment system; the more the throttle valve is closed, the smaller the intake manifold pressure is, and the less air volume in the engine is, the less complete the combustion in the engine is, and the higher the exhaust gas temperature is, the more beneficial it is to the catalytic treatment of the engine after-treatment system; that is, the closing degree of the throttle valve can affect the catalytic treatment temperature of the engine after-treatment system to a certain extent, that is, the throttle valve can play a role in regulating the catalytic treatment temperature of the engine after-treatment system; in this way, when the throttle valve is at a certain closing degree, the air flow entering the engine can be controlled by the throttle valve, thereby meeting the user's driving fuel consumption and thermal management needs of the engine after-treatment system.

[0077] During the actual throttle valve closing process, the vehicle controller will set the real-time throttle valve closing degree according to the user's driving fuel consumption and the thermal management requirements of the engine after-treatment system; the real-time throttle valve closing degree is within the range formed by the throttle valve basic control upper limit value and the throttle valve basic control lower limit value; the vehicle controller will adjust according to the real-time throttle valve closing degree, so that the real-time throttle valve closing degree is close to the throttle valve basic control upper limit value; that is, in a certain combustion mode, the throttle valve closing degree is a fixed value, thereby meeting the user's driving fuel consumption requirements and the thermal management requirements of the engine after-treatment system.

[0078] In the present embodiment, different throttle basic control limit ranges can be determined in different combustion modes, so that different real-time closing degrees of the throttle valve corresponding to different combustion modes are executed close to different throttle basic control upper limit values; that is, the throttle valve closing degree will be at the throttle valve upper limit value when the engine is in different combustion modes; the switching of the throttle valve closing degree in different combustion modes is realized; that is, the switching of different throttle basic control upper limit values ​​in different combustion modes is realized; generally, the switching of the throttle valve closing degree in different combustion modes is relatively drastic.

[0079] S120: Determine a limit range of engine boost pressure based on a crystallization temperature of an engine aftertreatment system.

[0080] Among them, the crystallization temperature of the engine after-treatment system is when the engine after-treatment system meets a certain preset temperature, the risk of urea crystallization in the engine after-treatment system is low; when the engine after-treatment system is lower than the preset temperature, urea crystals will appear in the engine after-treatment system.

[0081] The engine boost pressure is the air pressure output by the supercharger; in the present embodiment, the engine boost pressure limit range is a range consisting of an engine boost pressure upper limit value and an engine boost pressure lower limit value; when the engine boost pressure upper limit value is reached or exceeded, the engine output torque is large, the fuel is large, the exhaust temperature of the fuel itself is high, and the throttle valve closing degree basically does not reach the throttle valve upper limit value, so there is no need to correct the throttle valve upper limit value under this working condition; the engine boost pressure lower limit value is generally 0.

[0082] It is understandable that when the engine is in different combustion modes, the throttle valve closing degree will be at the throttle valve upper limit value when the real-time intake manifold pressure is within the upper and lower limits of the engine boost pressure.

[0083] S130: Acquire real-time engine intake manifold pressure.

[0084] Among them, the engine intake manifold pressure can be obtained in real time through the pressure detector; the real-time engine intake manifold pressure can meet the current user's fuel consumption requirements and the thermal management requirements of the engine after-treatment system of the current after-treatment system.

[0085] S140: Determine a dynamic limiting factor of the intake manifold pressure according to the real-time engine intake manifold pressure and the engine boost pressure limiting range.

[0086] Among them, since the intake manifold pressure is within the range formed by the engine boost pressure upper limit value and the engine boost pressure lower limit value, it is necessary to adjust the throttle valve to meet the catalytic treatment temperature of the engine aftertreatment system, so the throttle valve basic control upper limit value can be corrected. In this embodiment, when the real-time engine intake manifold pressure is within the engine boost pressure limit range, the dynamic limit factor of the intake manifold pressure can be determined according to the real-time dynamic engine intake manifold pressure and the engine boost pressure upper and lower limit values. The dynamic limit factor is a parameter in the range of 0-1, and the dynamic limit factor can correct the throttle valve basic control upper limit value.

[0087] S150: Determine the throttle valve control limit range under different combustion modes according to the dynamic limit factor and the throttle valve basic control limit range.

[0088] Among them, the throttle control upper limit value within the throttle control limit range in each combustion mode can be determined according to the dynamic limit factor and the throttle basic control upper limit value within the throttle basic control limit range, thereby determining the throttle control limit range in each combustion mode by the throttle basic control lower limit value and the throttle control upper limit value within the throttle basic control limit range; in this embodiment, since the dynamic limit factor can correct the throttle basic control upper limit value, the throttle basic control limit range is corrected to determine the throttle control limit range, thereby making the real-time throttle valve closing degree smoothly switched in each combustion mode. In addition, since the throttle basic control upper limit value within the throttle control limit range is smaller than the throttle basic control upper limit value within the throttle basic control limit range, the throttle valve closing degree is smaller, and the negative pressure in the engine is smaller, and the risk of oil dilution can be reduced in each combustion mode.

[0089] Optionally, based on the above embodiment, step S110 and step S120 are further refined. Figure 2 FIG. 1 is a flow chart of another engine throttle valve control method provided by an embodiment of the present invention; Figure 2 As shown, the method comprises the following steps:

[0090] S210. Based on the first MAP table, determine the throttle valve basic control upper limit value according to the speed parameters and torque parameters under different combustion modes; based on the second MAP table, determine the throttle valve basic control lower limit value according to the speed parameters and torque parameters under different combustion modes.

[0091] Among them, the first MAP table is a relationship diagram between the speed parameters and torque parameters under different combustion modes and the basic control upper limit of the throttle valve; the second MAP table determines the basic control lower limit of the throttle valve for the speed parameters and torque parameters under different combustion modes; therefore, based on the first MAP table, the basic control upper limit of the throttle valve is determined according to the speed parameters and torque parameters under different combustion modes; based on the second MAP table, the basic control lower limit of the throttle valve is determined according to the speed parameters and torque parameters under different combustion modes; the real-time closing degree of the throttle valve between the basic control lower limit of the throttle valve and the basic control upper limit of the throttle valve can be adjusted, and the final control value of the throttle valve will be executed according to the throttle valve control upper limit, so as to meet the fuel consumption requirements under different combustion modes and the thermal management requirements of the engine after-treatment system.

[0092] S220, correcting the throttle valve basic control upper limit value according to the intake manifold pressure influence parameter to determine the throttle valve basic corrected control upper limit value; correcting the throttle valve basic control lower limit value according to the intake manifold pressure influence parameter to determine the throttle valve basic corrected control lower limit value.

[0093] Among them, when the real-time closing degree of the throttle valve is within the basic control range of the throttle valve, the corresponding intake manifold pressure is within the basic pressure control range; considering that the intake manifold pressure influencing parameters will affect the basic pressure control range, the throttle valve basic control upper limit value and the throttle valve basic control lower limit value can be corrected according to the intake manifold pressure influencing parameters, and the throttle valve basic correction control upper limit value and the throttle valve basic correction control lower limit value can be determined respectively, so that the throttle valve basic control range can be accurately determined.

[0094] Specifically, the throttle basic control upper limit value is corrected according to the intake manifold pressure influence parameter to determine the throttle basic corrected control upper limit value, including: determining the intake manifold pressure influence parameter factor according to the intake manifold pressure influence parameter; determining the intake manifold pressure influence correction parameter according to the intake manifold pressure influence parameter factor and the intake manifold pressure influence parameter; determining the throttle basic corrected control upper limit value according to the intake manifold pressure influence correction parameter and the throttle basic control upper limit value; determining the throttle basic corrected control lower limit value according to the intake manifold pressure influence correction parameter and the throttle basic control lower limit value.

[0095] The intake manifold pressure influencing parameters include: atmospheric pressure parameters, engine temperature parameters, engine intake manifold temperature deviation and engine aftertreatment system temperature parameters. In some embodiments, the intake manifold pressure influencing correction parameter can be determined according to the product of the intake manifold pressure influencing parameter factor and the intake manifold pressure influencing parameter.

[0096] S230. Determine a basic upper limit value of the engine boost pressure and a basic lower limit value of the engine boost pressure based on the crystallization temperature of the engine aftertreatment system; and correct the basic upper limit value of the engine boost pressure according to the atmospheric pressure parameter to determine the upper limit value of the engine boost pressure; and correct the basic lower limit value of the engine boost pressure according to the atmospheric pressure parameter to determine the lower limit value of the engine boost pressure.

[0097] Among them, taking into account the influence of atmospheric pressure parameters on the engine boost pressure, this embodiment can correct the basic upper limit value of the engine boost pressure and the basic lower limit value of the engine boost pressure according to the atmospheric pressure parameters, so as to respectively determine the upper limit value of the engine boost pressure and the lower limit value of the engine boost pressure, thereby making the engine boost pressure range accurately determined.

[0098] Specifically, the engine boost pressure upper limit value is determined by correcting the engine boost pressure base upper limit value according to the atmospheric pressure parameter; including: determining the atmospheric pressure correction factor according to the atmospheric pressure parameter; determining the atmospheric pressure correction parameter according to the atmospheric pressure correction factor and the atmospheric pressure parameter; determining the engine boost pressure upper limit value according to the atmospheric pressure correction parameter and the engine boost pressure base upper limit value;

[0099] The engine boost pressure lower limit value is determined by correcting the engine boost pressure basic lower limit value according to the atmospheric pressure parameter; including: determining the atmospheric pressure correction factor according to the atmospheric pressure parameter; determining the atmospheric pressure correction parameter according to the atmospheric pressure correction factor and the atmospheric pressure parameter; determining the engine boost pressure lower limit value according to the atmospheric pressure correction parameter and the engine boost pressure basic lower limit value.

[0100] S240: Obtain real-time engine intake manifold pressure.

[0101] S250: Determine a dynamic limiting factor of the intake manifold pressure according to the real-time engine intake manifold pressure and the engine boost pressure limiting range.

[0102] S260: Determine the throttle valve control limit range under different combustion modes according to the dynamic limit factor and the throttle valve basic control limit range.

[0103] Based on the above embodiments, the present embodiment further accurately determines the basic control range of the throttle valve and the engine boost pressure range. In this way, the dynamic limit factor of the intake manifold pressure determined according to the real-time engine intake manifold pressure and the engine boost pressure limit range is accurate. Based on the accurately determined dynamic limit factor and the accurately determined throttle valve control limit range, the throttle valve control limit range under different combustion modes can be more accurately determined, thereby making the switching reliability of the throttle valve closing degree under different combustion modes higher.

[0104] Optionally, based on the above embodiment, step S250 and step S260 are further refined. Figure 3 FIG. 1 is a flow chart of another engine throttle valve control method provided by an embodiment of the present invention; Figure 3 As shown, the method comprises the following steps:

[0105] S310. Based on the first MAP table, determine the throttle valve basic control upper limit value according to the speed parameters and torque parameters under different combustion modes; based on the second MAP table, determine the throttle valve basic control lower limit value according to the speed parameters and torque parameters under different combustion modes.

[0106] S320, correcting the throttle valve basic control upper limit value according to the intake manifold pressure influence parameter to determine the throttle valve basic corrected control upper limit value; correcting the throttle valve basic control lower limit value according to the intake manifold pressure influence parameter to determine the throttle valve basic corrected control lower limit value.

[0107] Optionally, in some embodiments, after the throttle valve basic control upper limit value is corrected according to the intake manifold pressure influence parameter to determine the throttle valve basic correction control upper limit value, it also includes: according to a linear optimization function, performing linear optimization processing on the throttle valve basic correction control upper limit value and the throttle valve basic correction control lower limit value.

[0108] Among them, the linear optimization function is a function of the linear correlation between the throttle valve closing degree and the air flow through the throttle valve; according to the linear optimization function, the throttle valve basic correction control upper limit value and the throttle valve basic correction control lower limit value are linearly optimized, that is, after determining the throttle valve basic correction control upper limit value, the throttle valve closing degree can be correspondingly searched from the linear optimization table; if the corresponding throttle valve basic correction control upper limit value can be directly determined; if the corresponding throttle valve basic correction control upper limit value cannot be queried, the throttle valve basic correction control upper limit value is obtained by interpolation calculation. Similarly, after determining the throttle valve basic correction control lower limit value, the throttle valve closing degree can be correspondingly searched from the linear optimization table; if the corresponding throttle valve basic correction control lower limit value can be directly determined; if the corresponding throttle valve basic correction control lower limit value cannot be queried, the throttle valve basic correction control lower limit value is obtained by interpolation calculation; the throttle valve basic correction control upper limit value and the throttle valve basic correction control lower limit value are linearly optimized, so as to further make the throttle valve basic correction control upper limit value and the throttle valve basic correction control lower limit value more accurate.

[0109] S330. Determine a basic upper limit value of the engine boost pressure and a basic lower limit value of the engine boost pressure based on the crystallization temperature of the engine after-treatment system; and correct the basic upper limit value of the engine boost pressure according to the atmospheric pressure parameter to determine the upper limit value of the engine boost pressure; and correct the basic lower limit value of the engine boost pressure according to the atmospheric pressure parameter to determine the lower limit value of the engine boost pressure.

[0110] S340: Obtain real-time engine intake manifold pressure.

[0111] S350: When the real-time engine intake manifold pressure is within the engine boost pressure limit range, determine a dynamic engine boost pressure limit difference according to the real-time engine intake manifold pressure and the engine boost pressure lower limit.

[0112] Among them, when the intake manifold pressure is greater than the upper limit value of the engine boost pressure, the output torque of the engine is large, the fuel is large at this time, the exhaust temperature of the fuel itself is high, and the engine's demand for thermal management is weak. At this time, the throttle valve basically will not reach the throttle valve basic correction control upper limit value, so there is no need to correct the throttle valve basic correction control upper limit value under this working condition; therefore, when the real-time engine intake manifold pressure is greater than the engine boost pressure upper limit value, the dynamic limit factor of the intake manifold pressure is directly determined to be 1, and there is no need to determine the dynamic limit factor to correct the throttle valve basic control range; when the real-time engine intake manifold pressure is less than the engine boost pressure lower limit value, the dynamic limit factor of the intake manifold pressure is determined to be 0.

[0113] When the real-time engine intake manifold pressure is within the engine boost pressure limit range, the dynamic limit factor is determined based on the real-time engine intake manifold pressure and the engine boost pressure limit range; specifically, the dynamic engine boost pressure limit difference can be determined first based on the difference between the real-time engine intake manifold pressure and the engine boost pressure lower limit value.

[0114] S360: Determine a dynamic limiting factor according to the dynamic engine boost pressure limiting difference, the engine boost pressure lower limit, and the engine boost pressure upper limit.

[0115] Specifically, the dynamic limiting factor Q is: dynamic engine boost pressure limit difference / (difference between engine boost pressure upper limit and engine boost pressure lower limit); the dynamic limiting factor is between 0-1.

[0116] S370, determining the throttle valve control upper limit value under different combustion modes according to the dynamic limiting factor, the throttle valve basic control upper limit value and the throttle valve basic control lower limit value; determining the throttle valve control limiting range by the throttle valve basic control lower limit value and the throttle valve control upper limit value.

[0117] Among them, the throttle valve control upper limit value under different combustion modes is determined according to the dynamic limiting factor, the throttle valve basic control upper limit value and the throttle valve basic control lower limit value, including: determining the throttle valve basic control limit difference according to the throttle valve basic control upper limit value and the throttle valve basic control lower limit value; determining the throttle valve basic control upper limit deviation according to the throttle valve basic control limit difference and the dynamic limiting factor; determining the throttle valve control upper limit value under different combustion modes according to the throttle valve basic control upper limit deviation and the throttle valve basic control lower limit value.

[0118] In some embodiments, specifically, the throttle valve control upper limit value is: dynamic limiting factor Q*(throttle valve basic control upper limit value-throttle valve basic control lower limit value)+throttle valve basic correction control lower limit value.

[0119] Based on the above embodiments, the present embodiment further accurately determines the basic control range of the throttle valve, and specifically determines the dynamic limit factor of the intake manifold pressure according to the real-time engine intake manifold pressure and the engine boost pressure limit range, and further specifically determines the throttle valve control limit range under different combustion modes according to the dynamic limit factor and the accurately determined basic control limit range of the throttle valve, thereby further improving the reliability of switching the throttle valve closing degree under different combustion modes.

[0120] An embodiment of the present invention further provides an engine throttle valve control device; the engine throttle valve control device can execute the engine throttle valve control method provided by any embodiment of the present invention, and has functional modules and beneficial effects corresponding to the execution method. Figure 4is a structural schematic diagram of an engine throttle valve control device provided by an embodiment of the present invention; Figure 4 As shown, the engine throttle valve control device includes:

[0121] A first determination module 10 is used to determine a basic control limit range of a throttle valve under different combustion modes of the engine;

[0122] A second determination module 20, for determining a limit range of the engine boost pressure based on a crystallization temperature of an engine aftertreatment system;

[0123] Acquisition module 30, used to obtain real-time engine intake manifold pressure

[0124] a third determination module 40, configured to determine a dynamic limiting factor of the intake manifold pressure according to the real-time engine intake manifold pressure and the engine boost pressure limiting range;

[0125] The fourth determination module 50 is configured to determine the throttle valve control limit range under different combustion modes according to the dynamic limit factor and the throttle valve basic control limit range.

[0126] Optional, Figure 5 is a specific structural schematic diagram of an engine throttle valve control device provided by an embodiment of the present invention; Figure 5 As shown, the first determination module 10 includes:

[0127] A first throttle valve basic control unit 11 is used to determine a throttle valve basic control upper limit value according to a speed parameter and a torque parameter under different combustion modes based on a first MAP table;

[0128] The second throttle valve basic control unit 12 is used to determine the throttle valve basic control lower limit value based on the second MAP table according to the speed parameters and torque parameters under different combustion modes.

[0129] Optional, continue to refer to Figure 5 , the first determining module 10 further includes:

[0130] A first correction unit 13, configured to correct the throttle valve basic control upper limit value according to an intake manifold pressure influence parameter to determine a throttle valve basic correction control upper limit value;

[0131] The second correction unit 14 is used to correct the throttle valve basic control lower limit value according to the intake manifold pressure influence parameter to determine the throttle valve basic correction control lower limit value.

[0132] Optional, continue to refer to Figure 5 , the second determining module 20 comprises:

[0133] A pressure determination unit 21, for determining an engine boost pressure basic upper limit value and an engine boost pressure basic lower limit value based on a crystallization temperature of an engine aftertreatment system;

[0134] A third correction unit 22, used to correct the engine boost pressure base upper limit value according to the atmospheric pressure parameter to determine the engine boost pressure upper limit value;

[0135] The fourth correction unit 23 is used to correct the basic lower limit value of the engine boost pressure according to the atmospheric pressure parameter to determine the lower limit value of the engine boost pressure.

[0136] Optional, continue to refer to Figure 5 , the third determination module 40 includes:

[0137] a first dynamic limiting factor unit 41, configured to determine a dynamic limiting factor of the intake manifold pressure according to the real-time engine intake manifold pressure and the engine boost pressure limiting range when the real-time engine intake manifold pressure is within the engine boost pressure limiting range;

[0138] The second dynamic limiting factor unit 42 is used to determine that the dynamic limiting factor of the intake manifold pressure is 1 when the real-time engine intake manifold pressure is greater than the engine boost pressure upper limit value.

[0139] The third dynamic limiting factor unit 43 is used to determine that the dynamic limiting factor of the intake manifold pressure is 0 when the real-time engine intake manifold pressure is less than the engine boost pressure lower limit value.

[0140] Optionally, the first dynamic limiting factor unit is specifically:

[0141] Determining a dynamic engine boost pressure limit difference value according to the real-time engine intake manifold pressure and the engine boost pressure lower limit value;

[0142] The dynamic limiting factor is determined according to the engine boost pressure limiting difference, the engine boost pressure lower limit and the engine boost pressure upper limit.

[0143] Optional, continue to refer to Figure 5 , the fourth determining module 50 comprises:

[0144] A throttle control unit 51, configured to determine a throttle control upper limit value under different combustion modes according to the dynamic limiting factor, the throttle basic control upper limit value and the throttle basic control lower limit value;

[0145] The throttle valve control range unit 52 is used to determine the throttle valve control limit range according to the throttle valve basic control lower limit value and the throttle valve control upper limit value.

[0146] The embodiment of the present invention also provides a vehicle controller; Figure 6 is a structural diagram of a vehicle controller provided by an embodiment of the present invention, Figure 6 A schematic diagram of the structure of a vehicle controller 100 that can be used to implement an embodiment of the present invention is shown. The vehicle controller is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workbenches, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The vehicle controller can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0147] like Figure 6 As shown, the vehicle controller 100 includes at least one processor 101, and a memory connected to the at least one processor 101, such as a read-only memory (ROM) 102, a random access memory (RAM) 103, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 101 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 102 or the computer program loaded from the storage unit 18 to the random access memory (RAM) 103. In RAM 103, various programs and data required for the operation of the vehicle controller 100 can also be stored. The processor 101, ROM 102 and RAM 103 are connected to each other through a bus 104. An input / output (I / O) interface 105 is also connected to the bus 104.

[0148] Multiple components in the vehicle controller 100 are connected to the I / O interface 105, including: an input unit 106, such as a keyboard, a mouse, etc.; an output unit 107, such as various types of displays, speakers, etc.; a storage unit 108, such as a disk, an optical disk, etc.; and a communication unit 109, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 109 allows the vehicle controller 100 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0149] The processor 101 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the processor 101 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various dedicated artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 101 executes the various methods and processes described above, such as an engine throttle control method.

[0150] In some embodiments, an engine throttle control method may be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 108. In some embodiments, part or all of the computer program may be loaded and / or installed on the vehicle controller 100 via the ROM 102 and / or the communication unit 109. When the computer program is loaded into the RAM 103 and executed by the processor 101, one or more steps of the engine throttle control method described above may be performed. Alternatively, in other embodiments, the processor 101 may be configured to execute the engine throttle control method in any other appropriate manner (e.g., by means of firmware).

[0151] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0152] Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that when the computer program is executed by the processor, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0153] In the context of the present invention, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in combination with an instruction execution system, device or equipment. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0154] To provide interaction with a user, the systems and techniques described herein may be implemented on a vehicle controller having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and a pointing device (e.g., a mouse or a trackball), through which a user may provide input to the vehicle controller. Other types of devices may also be used to provide interaction with a user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0155] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0156] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The client and server relationship is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services.

[0157] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0158] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

[0159] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. An engine throttle valve control method, characterized in that: include: Determine the basic control limit range of the throttle valve under different combustion modes of the engine; Determining the engine boost pressure limit range based on the engine aftertreatment system crystallization temperature; Get real-time engine intake manifold pressure; Determining a dynamic limiting factor of the intake manifold pressure according to the real-time engine intake manifold pressure and the engine boost pressure limiting range; The throttle valve control limit range under different combustion modes is determined according to the dynamic limit factor and the throttle valve basic control limit range.

2. The engine throttle valve control method according to claim 1, characterized in that: Determine the basic throttle control limit range under different engine combustion modes, including: Based on the first MAP table, determining a throttle valve basic control upper limit value according to speed parameters and torque parameters under different combustion modes; Based on the second MAP table, the throttle valve basic control lower limit value is determined according to the speed parameters and the torque parameters under different combustion modes.

3. The engine throttle valve control method according to claim 2, characterized in that: Determine the basic throttle control limit range under different combustion modes of the engine, including: Correcting the throttle valve basic control upper limit value according to the intake manifold pressure influence parameter to determine the throttle valve basic correction control upper limit value; The throttle valve basic control lower limit value is corrected according to the intake manifold pressure influence parameter to determine the throttle valve basic corrected control lower limit value.

4. The engine throttle valve control method according to claim 3, characterized in that: The throttle valve basic control upper limit value is corrected according to the intake manifold pressure influence parameter to determine the throttle valve basic corrected control upper limit value, including: Determine an intake manifold pressure influencing parameter factor according to the intake manifold pressure influencing parameter; Determining an intake manifold pressure influence correction parameter according to the intake manifold pressure influence parameter factor and the intake manifold pressure influence parameter; Determining a throttle valve basic correction control upper limit value according to the intake manifold pressure influence correction parameter and the throttle valve basic control upper limit value; A throttle valve basic correction control lower limit value is determined according to the intake manifold pressure influence correction parameter and the throttle valve basic control lower limit value.

5. The engine throttle valve control method according to claim 3 or 4, characterized in that: The intake manifold pressure influencing parameters include: atmospheric pressure parameters, engine temperature parameters, engine intake manifold temperature deviation and engine after-treatment system temperature parameters.

6. The engine throttle valve control method according to claim 1, characterized in that: The engine boost pressure limit range is determined based on the crystallization temperature of the engine aftertreatment system, including: Determining an engine boost pressure basic upper limit value and an engine boost pressure basic lower limit value based on a crystallization temperature of an engine aftertreatment system; The engine boost pressure upper limit value is determined by correcting the engine boost pressure base upper limit value according to the atmospheric pressure parameter; The engine boost pressure lower limit value is determined by correcting the engine boost pressure base lower limit value according to the atmospheric pressure parameter.

7. The engine throttle valve control method according to claim 6, characterized in that: The engine boost pressure upper limit value is determined by correcting the engine boost pressure base upper limit value according to the atmospheric pressure parameter, including: determining an atmospheric pressure correction factor according to the atmospheric pressure parameter; Determining an atmospheric pressure correction parameter according to the atmospheric pressure correction factor and the atmospheric pressure parameter; Determining an upper limit value of the engine boost pressure according to an atmospheric pressure parameter and the basic upper limit value of the engine boost pressure; The method of correcting the basic lower limit value of the engine boost pressure according to the atmospheric pressure parameter to determine the lower limit value of the engine boost pressure includes: determining an atmospheric pressure correction factor according to the atmospheric pressure parameter; Determining an atmospheric pressure correction parameter according to the atmospheric pressure correction factor and the atmospheric pressure parameter; The engine boost pressure lower limit value is determined according to the atmospheric pressure parameter and the engine boost pressure basic lower limit value.

8. The engine throttle valve control method according to claim 1, characterized in that: Determining a dynamic limiting factor of the intake manifold pressure according to the real-time engine intake manifold pressure and the engine boost pressure limiting range includes: When the real-time engine intake manifold pressure is within the engine boost pressure limit range, determining a dynamic limit factor of the intake manifold pressure according to the real-time engine intake manifold pressure and the engine boost pressure limit range; When the real-time engine intake manifold pressure is greater than the engine boost pressure upper limit value, determining the dynamic limit factor of the intake manifold pressure to be 1; When the real-time engine intake manifold pressure is less than the engine boost pressure lower limit value, the dynamic limit factor of the intake manifold pressure is determined to be zero.

9. The engine throttle valve control method according to claim 8, characterized in that: When the real-time engine intake manifold pressure is within the engine boost pressure limit range, a dynamic limit factor of the intake manifold pressure is determined according to the real-time engine intake manifold pressure and the engine boost pressure limit range, specifically: determining a dynamic engine boost pressure limit difference value according to the real-time engine intake manifold pressure and the engine boost pressure lower limit value; The dynamic limiting factor is determined according to the dynamic engine boost pressure limiting difference, the engine boost pressure lower limit value and the engine boost pressure upper limit value.

10. The engine throttle valve control method according to claim 1, characterized in that: Determining the throttle valve control limit range under different combustion modes according to the dynamic limit factor and the throttle valve basic control limit range includes: Determining the throttle valve control upper limit value under different combustion modes according to the dynamic limiting factor, the throttle valve basic control upper limit value and the throttle valve basic control lower limit value; The throttle valve basic control lower limit value and the throttle valve control upper limit value determine the throttle valve control restriction range.

11. The engine throttle valve control method according to claim 10, characterized in that: Determining the throttle valve control upper limit value under different combustion modes according to the dynamic limiting factor, the throttle valve basic control upper limit value and the throttle valve basic control lower limit value includes: Determining a throttle valve basic control limit difference according to the throttle valve basic control upper limit value and the throttle valve basic control lower limit value; Determining a throttle valve basic control upper limit deviation according to the throttle valve basic control limit difference and the dynamic limit factor; The throttle valve control upper limit value under different combustion modes is determined according to the throttle valve basic control upper limit deviation and the throttle valve basic control lower limit value.

12. The engine throttle valve control method according to claim 3, characterized in that: After the throttle valve basic control lower limit value is corrected according to the intake manifold pressure influence parameter to determine the throttle valve basic corrected control lower limit value, the method further includes: According to the linear optimization table, the throttle valve basic correction control upper limit value and the throttle valve basic correction control upper limit value are linearly optimized.

13. An engine throttle valve control device, used to execute the engine throttle valve control method according to any one of claims 1 to 12, characterized in that: The engine throttle valve control device comprises: A first determination module is used to determine a basic control limit range of a throttle valve under different combustion modes of the engine; A second determination module, configured to determine a limit range of the engine boost pressure based on a crystallization temperature of an engine aftertreatment system; Acquisition module, used to obtain real-time engine intake manifold pressure a third determination module, configured to determine a dynamic limiting factor of the intake manifold pressure according to the real-time engine intake manifold pressure and the engine boost pressure limiting range; The fourth determination module is used to determine the throttle valve control limit range under different combustion modes according to the dynamic limit factor and the throttle valve basic control limit range.

14. A vehicle controller, characterized in that: The vehicle controller comprises: one or more processors; a storage device for storing one or more programs, When the one or more programs are executed by the one or more processors, the one or more processors implement the engine throttle control method as described in any one of claims 1-12.

15. A storage medium containing computer executable instructions, characterized in that: The computer executable instructions are used to execute the engine throttle valve control method as claimed in any one of claims 1 to 12 when executed by a computer processor.

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